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APPENDIX.
Standard Factors in English and Metric Systems.
Abbreviations:  Cubic  metre=cu. m.;  cubic  foot=cu.  ft.; kilogramme =k2.; pounds=lbs.: square millimetre=sq. foro-; British thermal unit=B. t. u.; ualorlo--cal.
1 metre=39.37 inches. 1 cu. m.=35.316 ou. ft. 1 kg.=2.2046 Ibs.
1 kg. per sq. mm.1422.32 Ibs. per sq. inch. 1 kg. per cu. m.0.0624 Ibs. per cu. ft. 1 gross ton=2240 Ibs. 1 metric ton=2205 Ibs. 1 calorie raises 1 kg. of water 1 Cent. 1B. t. u. raises 1 pound of water 1. Fahr. 1 calorie=3.968 B. t. u. 1 cal. per cu. m.=0.112 B. t. u. per cu. ft. 1 cal. per kg.=1.8 B. t. u. per pound. 1 B. t. TI. per cu. ft.=8.9 cals. per cu. metre. 1 kg. per cu. metre=0.0624 Ibs. per cu. ft. 1 Boiler horse-power=33305 B. t. u. per hour. 1 Boiler horse-power=8390 calories per hour. 1 Indicated horse-power=61090 B. t. u. or 15394 calories when used continuously for 24 hours.
Gravimetric and Calorific Values.
	Weight per Volume.		Products of combustion.	Calorific Value.				'Specific Heat. Cals. per cu. m. or B. t. u. percu.ft.
	Kg. per cu. m.	Lbs. per cu. ft.		Cals. per kg.	Cals. per cu. m.	B. t. u. per Ib.	B. t. u. per cu. ft.	
Air N O CO, eo H C2H4 C Si P Fe Fe Mn	1.29 1.26 1.43 1.97 1.25 0.09 0.72 1.25	0.080 0.079 0.089 0.123 0.078 0.0056 0.045 0.078						0.307 0.307 0.312 0.426 0.310 0.305 0.424 0.463
								
								
								
			     CO, HaO C0a and HaO CO2 and HaO CO CO,   . SiOa 5 Fe203 MnO	2438 29040 11970 10300 2450 8133 6414 5740 1173 1746 1635	3072   ' 2614 8820 12980	4390 54000. 21546 18540 4410 14640 11545 10330 2110 3140 2940	345 294 967 1454	
								
								
								
								
								
								
								
FORMULA FOR SPECIFIC HEAT OF GASE3 BETWEEN 0C and t.
CO,                        =0.374 +0.000271
CO, O, H, N and 0 = 0,30 > +0.0000271 H,O                       = 0 342 4- 0.000151
CH                         0.418 4- 0.000241
CSH4'                      -=0.424 +0.000581
Mariotte's Law.The volume of a gas is directly proportional to the absolute temperature
and inversely proportional to the pressure upon it.
Note: Absolute zero  - 273'5C. law of Dulong and Petit.The product of the atomic -weight of an elementary subitanc*
by its specific heat is always a constant quantity.